Question

Example user input

http://example.com/
http://example.com/topic/
http://example.com/topic/cars/
http://www.example.com/topic/questions/

I want a PHP function to make the output like

example.com
example.com/topic/
example.com/topic/cars/
www.example.com/topic/questions/

Answer 1

You should use an array of “disallowed” terms and use strpos and str_replace to dynamically remove them from the passed-in URL:

function remove_http($url) {
   $disallowed = array('http://', 'https://');
   foreach($disallowed as $d) {
      if(strpos($url, $d) === 0) {
         return str_replace($d, '', $url);
      }
   }
   return $url;
}